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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A317273 Number of permutations of [n*(n+1)/2] whose lengths of increasing runs are the positive integers from 1 to n.

Table of values

n a(n)
0 1
1 1
2 4
3 202
4 163692
5 2487100956
6 832252747110528
7 7116720347983770858600
8 1776529280247277318394451118272
9 14580103976468323893693256154922439405632
10 4377460729080839690885111988468699720430287682744896
11 52959485251272238069446517666752040946228209263610778166878160384

List of values

[1, 1, 4, 202, 163692, 2487100956, 832252747110528, 7116720347983770858600, 1776529280247277318394451118272, 14580103976468323893693256154922439405632, 4377460729080839690885111988468699720430287682744896, 52959485251272238069446517666752040946228209263610778166878160384]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.